JP2000094992A - Moving mechanism for vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving mechanism having a constitution to be easily miniaturized for moving a seat main body along a non-circular locus between a front side position facing the front side of a vehicle and a side face position facing an in/out getting side. SOLUTION: A moving mechanism for a vehicular seat is provided with a first fixed gear 21 fixed to a car room floor side, a second fixed gear 22 fixed to a seat side, a planetary gear 23 engaged with the two fixed gears 21 and 22 and a connecting arm for connecting the gears to one another by rotatably supporting these. A seat main body 10 is moved by the planetary movement of the planetary gear 23 on the outer circumference of the first fixed gear 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat body of a vehicle seat supported on a cabin floor between a front position facing the front of the vehicle and a side position facing the entrance of the vehicle. The present invention relates to a moving mechanism for moving by means of a moving member.

[0002]

2. Description of the Related Art As one type of a vehicle seat, a seat body of a vehicle seat supported on a vehicle cabin floor is positioned between a front position facing the front of the vehicle and a side position facing the entrance of the vehicle. There is a type of vehicle seat provided with a moving mechanism for moving between vehicles.

[0003] A vehicle seat of this type is designed for a person who has difficulty in getting on and off a normal seat provided in a vehicle cabin. After the seat body at the front position facing the vehicle is turned to the side facing the entrance, the seat body positioned at the side facing the entrance is turned to the front position facing the front of the vehicle. It is intended to move the passengers to get on and off.

Further, in a vehicle seat of this type, as disclosed in JP-A-7-89382, JP-A-9-118156, etc.
There is a case where it is mounted on a lifter of a transport mechanism that is mounted in a vehicle compartment and that can move in and out of the vehicle compartment and that can move up and down at a position to move to the outside. The seat body of the vehicle seat of this type is rotatable on a lifter between a front position facing the front side of the vehicle and a side position facing the entrance side of the vehicle. The seat body positioned on the side surface facing the side is carried out of the vehicle by a lifter and is lifted and lowered outside the vehicle, thereby facilitating getting on and off of the occupant.

[0005] Some of the vehicle seats are configured such that the seat body is movable between a lifter and a wheelchair trolley. In this case, the vehicle seat becomes a wheelchair seat. It is also very convenient for disabled people to be able to get on and off the passenger compartment while sitting on the seat and to get on and off the wheelchair cart.

[0006]

In each of the above-mentioned vehicle seats, since the basic operation of the seat body is to rotate in the horizontal direction about the center support portion, the seat body is in the horizontal direction. It is important that the vehicle does not interfere with other seats disposed in the passenger compartment or a part of the vehicle body during the rotation operation.

Therefore, in the vehicle seat,
The disposition position needs to be set so as not to interfere with other seats or a part of the vehicle body or the like during the rotation operation of the seat body.
However, due to limitations in the cabin space, it is difficult to arrange seats, especially in vehicles with a small cabin space. In some cases, the necessary space cannot be secured.

Therefore, in the vehicle seat,
Attempts have been made to add a movement in which the seat gradually moves in one direction during the rotation, to the basic operation of the rotation of the seat body, but this attempt is difficult, and the proposed rotation and the one-way Since the moving mechanism having both functions of moving to the vehicle is complicated and large, it is not suitable as a moving mechanism for a vehicle seat.

Accordingly, an object of the present invention is to provide a small-sized moving mechanism with a simple structure suitable for a vehicle seat of this type.

[0010]

According to the present invention, a seat body of a vehicle seat supported on a cabin floor is provided with a front position facing a front side of a vehicle and a side position facing a doorway side of the vehicle. A first fixed gear fixed to the vehicle cabin floor side, a second fixed gear fixed to the seat body side, and meshed with these two fixed gears. A planetary gear and a connecting arm for rotatably supporting and connecting each of these gears are provided.

In the moving mechanism according to the present invention, it is preferable that a pitch circle diameter of the first fixed gear is larger than a pitch circle diameter of the second fixed gear and the planetary gear.

Further, the moving mechanism according to the present invention is provided between the upper surface of the mounting base provided on the vehicle floor and the lower surface of the seat body, or the mounting base provided on the vehicle floor. And a lower surface of a lifter that supports the seat body and moves up and down outside the vehicle.

[0013]

In the moving mechanism according to the present invention, when the seat body at the front position facing the front side of the vehicle is rotated to the side surface facing the entrance side of the vehicle,
The second fixed gear rotates with respect to the planetary gear, and the planetary gear rotates with respect to the first fixed gear. For this reason, the connecting arm that supports the first fixed gear, the planetary gear, and the second fixed gear rotates about the support portion of the first fixed gear, and connects the planetary gear and the second fixed gear to the first fixed gear. Is moved along a circular orbit at a predetermined interval on the outer peripheral side of the fixed gear.

As a result, the seat body to which the second fixed gear is fixed moves along the above-mentioned circular orbit (rotation trajectory) around the fixed portion of the second fixed gear, and enters the vehicle at the entrance / exit side. Approaching while rotating to the side position facing. That is, the seat body approaches the entrance of the vehicle by performing a combined operation of the rotation operation about the second fixed gear and the movement operation of the second fixed gear along the above-described rotation trajectory. Reach the side position facing the entrance side of. Further, the seat body located on the side surface side facing the entrance side of the vehicle operates in the opposite direction to the above and reaches the front side position facing the front side of the vehicle.

Therefore, in the vehicle seat provided with the moving mechanism according to the present invention, the seat body is disposed in the vehicle cabin as compared with the seat that performs only the rotating operation about the support portion. Since the seat, a part of the vehicle body, and the like can be avoided, the seat can be arranged at a position where a foot space between adjacent seats or other necessary space can be secured.

Thus, the moving mechanism according to the present invention comprises the first and second fixed gears, the planetary gears and the connecting arms, and can be made simple and compact. Therefore, it is most suitable as a vehicle seat moving mechanism.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a vehicle seat S1 provided with a moving mechanism according to an example of the present invention. The vehicle seat S1 includes a seat cushion 11, a seat back 12,
The seat body 10 includes a headrest 13, a pair of left and right armrests 14, and a footrest 15, a moving mechanism 20 and a support mechanism 30 shown in FIG. 2, and a lock mechanism 40 shown in FIG. The support mechanism 16 is provided between the lower surface of the support base 16 that supports the lower surface of the seat cushion 11 and the support mechanism 30 that is provided between the upper surface of a mounting base 52 provided on the vehicle cabin floor 51.

The moving mechanism 20 moves the seat body 10 between a front position facing the front of the vehicle and a side position facing the entrance of the vehicle, as shown in FIGS. As shown, a first fixed gear 21 and a second fixed gear 22
A planetary gear 23 meshing with both fixed gears 21 and 22;
A pair of upper and lower connecting arms 24 that rotatably support and connect these gears 21 to 23 to each other are used as main constituent members. In these gears 21 to 23, the pitch circle diameter of the first fixed gear 21 is formed to be larger than the pitch circle diameter of the second fixed gear 22 and the planetary gear 23.

The support mechanism 30 is a cylindrical support cylinder 3 having a bottom.
1 and a disk-shaped rotary plate 32 rotatably supported by an upper end opening of the support cylinder 31, and is erected by fixing the lower surface of the support cylinder 31 to the upper surface of the mounting base 52. I have. The rotating plate 32 has a support hole 32a on its outer peripheral side.
In the support hole 32 a, a support shaft 17 provided on the lower surface of the support base 16 is rotatably supported via a bearing 33.

Thus, the first fixed gear 21, the second fixed gear 22, and the planetary gear 23, which constitute the moving mechanism 20,
The first fixed gear 21 is fixed to the bottom of the support cylinder 31, the second fixed gear 32 is fixed to the support shaft 17, and the planetary gear 23 is in a non-fixed state. It is in. In this state, as shown in FIG. 3, the first fixed gear 21 meshes with the planetary gear 23, and the planetary gear 23 meshes with the second fixed gear 22. In these gears 21 to 23, the second fixed gear 22 and the planetary gear 23 have the same pitch circle diameter, and
The fixed gear 21 is formed to have a larger pitch circle diameter than the second fixed gear 22 and the planetary gear 23.

In the moving mechanism 20, the seat body 10
Is pressed forward and to the left, a pressing force in the same direction is applied to the planetary gear 23 via the second fixed gear 22, and the planetary gear 23 moves while rolling on the outer periphery of the first fixed gear 21. At the same time, the connecting arm 24 rotates about the support portion of the first fixed gear 21 to rotate the second fixed gear 22 along a circular orbit (rotation locus L1) on the outer peripheral side of the first fixed gear 21.

FIG. 3 shows an operation state of the moving mechanism 20, in which the second fixed gear 22 rotates on a rotation locus L1 about the support portion of the first fixed gear 22, and moves for a maximum distance L2. Move to the left. Thereby, the seat body 10 moves from the front side position facing the front side of the vehicle indicated by the solid line in FIG. 1 to the side position facing the entrance / exit side of the vehicle indicated by the two-dot chain line.

As shown in FIGS. 4A and 4B, the lock mechanism 40 includes a lock pin 41, a lock guide 42, a spring 43, a release lever 44, and a pair of stoppers 4.
5a, 45b, each stopper 4
5a and 45b are provided at predetermined positions on the upper surface of the mounting base 52, and the other members 41 to 44 are provided on the support base 16 side.

The lock pin 41 is inserted into an inner hole of a lock guide 42 fixed to the support base 16 via a spring 43, and the spring 43 closes an upper end opening of the lock guide 42. The lock pin 41 is supported by the bolt 46 to urge the lock pin 41 downward, and the mounting base 5
2 is selectively engaged with the lock holes of the respective stoppers 45a and 45b. The release lever 44 is supported by a bracket 16a provided on the support base 16 and is rotatable in a vertical direction.

The release lever 44 has a grip 4
4a, and is engaged with an engagement projection 41a provided on the outer periphery of the lock pin 41 by an elongated hole provided at the rear end. As a result, the release lever 44 protrudes forward in the horizontal state, and the lock pin 41 is connected to each of the stoppers 45a and 45.
The support base 16 is locked to the mounting base 52 by engaging with one of the lock holes 5b. When the release lever 44 in this state is rotated upward while gripping the grip portion 44a, the lock pin 41 is moved upward against the spring 43 and pulled out from the lock holes of the stoppers 45a and 45b. Then, the locked state of the support base 16 with respect to the mounting base 52 is released.

Regarding the positional relationship between the lock pin 41 and the stoppers 45a and 45b in the lock mechanism 40, the first stopper 45a is located at the front side where the seat body 10 faces the front side of the vehicle (see FIG. 1). When the lock pin 41 is set to the position where the lock pin 41 is engaged (indicated by a solid line), and the second stopper 45b is located at the side surface position facing the entrance / exit side of the vehicle by moving the seat body 10 to the maximum extent ( The lock pin 41 is set at a position where the lock pin 41 is engaged in the state shown by the two-dot chain line in FIG.

As shown in FIG. 5, the vehicle seat S1 provided with these mechanisms 20, 30, and 40 is disposed between the front seat SF and the rear seat SR. It is possible to move between a front position facing the front side of the vehicle (a state shown by a solid line in the drawing) and a side position facing the entrance / exit side of the vehicle (a state shown by a dashed line in the drawing). In the vehicle, the entrance for the vehicle seat S1 is formed between the center pillar 53a and the rear pillar 53b, and the entrance is opened and closed by the side door 54.

In a normal state, the vehicle seat S1 is located at a front position facing the front side of the vehicle as shown by a solid line in FIGS. The movement is restricted by the locking action on the mounting base 52.

When the release lever 44 constituting the lock mechanism 40 is rotated upward in the vehicle seat S1 in the locked state, the lock pin 41 is moved upward to be pulled out of the first stopper 45a and to be released from the support base 16a. Of the seat base 10 is released, and the seat body 10 can be moved. Therefore, when the seat body 10 is pressed forward and leftward of the vehicle, the planetary gear 2
3, the pressing force in the same direction is applied, the planetary gear 23 moves while rolling on the outer periphery of the first fixed gear 21, and the connecting arm 24 rotates about the support portion of the first fixed gear 21. .

As a result, as shown in FIG. 3, the second fixed gear 22 rotates on the rotation trajectory L1 around the support of the first fixed gear 22, and moves to the left by the maximum distance L2. When the sheet body 10 moves by the distance L2, the upwardly moving lock pin 41 is positioned on the second stopper 45b, and when the release operation of the release lever 44 is released, the lock pin 41 is inserted into the lock hole of the second stopper 45b. Then, the support base 16 is locked with respect to the mounting base 52 so that the seat body 10 is fixed.

During this time, the seat body 10 moves while avoiding the front seat SF, the rear seat SR, and the pillars 53a and 53b, as shown by the two-dot chain line in FIG. 1 and the one-dot chain line in FIG. Then, the passenger faces the entrance between the pillars 53a and 53b, and the passenger gets on and off the vehicle seat S1.

By operating the release lever 44 of the lock mechanism 40 in the same manner as described above to operate the seat body 10 in the opposite direction to the above, the seat body 10 is moved to the front position facing the front side of the vehicle. Can be located.

As described above, in the vehicle seat S1, the other seats SF, SR, and S4 provided in the vehicle compartment are compared with the seat in which the seat body performs only the rotation operation about the support portion. Since a part of the vehicle body or the like can be avoided, it can be disposed in a space where a foot space between adjacent seats or other necessary space can be secured.

The moving mechanism 20 for moving the seat body 10 in this manner is composed of a first fixed gear 21, a second fixed gear 22, a planetary gear 23 and a connecting arm 24. The configuration can be simple and small.

FIG. 6 shows a moving mechanism 2 according to an example of the present invention.
Another vehicle seat S2 with a zero is shown. As shown in FIGS. 6 and 7, the vehicle seat S2 includes a seat body 10 including a seat cushion 11, a seatback 12, a headrest 13, a pair of left and right armrests 14, and a footrest 15, a moving mechanism 20, and a support mechanism 30. And the lock mechanism 40 are the same as the above-described vehicle seat S1.

In the vehicle seat S2, the seat body 10 is supported by the lifter 60, and the seat body 10 located at the side surface facing the entrance / exit side of the vehicle is operated by the lifter 60. The seat body 10 which is carried out of the vehicle by a predetermined amount through the entrance and lowered by a predetermined amount outside the vehicle, and is located at the lowered position outside the vehicle
And a predetermined amount is carried into the vehicle through the entrance. The lifter 60 is configured by a transport mechanism provided on a mounting base 52 provided on the vehicle cabin floor 51 and a receiving mechanism for receiving the seat body 10.

The transport mechanism of the lifter 60 includes a movable table 62 movably mounted on a base 61, and a driving member 63 movably mounted on the movable table 62. A receiving table 64 that supports and receives the sheet body 10;
Connecting arm 65 for connecting receiving table 64 to driving member 63
a, 65b. Each connecting arm 65a, 65b
Has a pair of right and left.

In the vehicle seat S2, the moving mechanism 20, the support mechanism 30, and the lock mechanism 40 are arranged as shown in FIG.
As shown in FIG. 5, the moving mechanism 2 is provided between a base 61 and a mounting base 52 that constitute the lifter 60.
0, the movement of the support mechanism 30, and the lock mechanism 40 with respect to the seat body 10, the support action, the lock action, etc.
The operation is similar to that of 0,40.

The lifter 60 functions to convey a predetermined amount of the sheet main body 10 located at the side surface side facing the entrance / exit side to the outside of the vehicle and to lower the sheet main body 10 conveyed by the predetermined amount by a predetermined amount. Due to the operation of the moving mechanism 20, the seat body 1 in the vehicle is located at a side surface position facing the entrance side.
0 is pushed from the back side, the moving table 62 is moved to the base 16.
After moving up, the seat body 10 is conveyed out of the vehicle through the entrance while being seated on the receiving table 64. In this state, if the driving member 63 is driven, for example, electrically, the driving member 63 moves on the moving table 62 and the receiving table 64 is
It is lowered to a predetermined position while being pushed forward through 5a and 65b.

As a result, the seat body 10 reaches the lowered position outside the vehicle, as indicated by the two-dot chain line in FIGS. 5 and 6, thereby facilitating getting on and off the seat body 10. The seat body 10 is carried into the vehicle by the reverse operation of the lifter 60, and the front position facing the front side of the vehicle as shown by the solid line in FIG. 6 by the reverse operation of the moving mechanism 20. Is located.

FIG. 8 shows an example in which a drive mechanism 70 for automatically rotating the seat body 10 is provided.
The drive mechanism 70 rotates the rotary plate 32 of the support mechanism 30 to rotate the sheet main body 10.
As shown in FIG.
a, and a small gear 72 fixed to the output shaft of the drive motor 71, and an arcuate tooth 73 fixed to the periphery of the rotating plate 32.
3 meshes with the small gear 72.

Thus, in the driving mechanism 70, the small gear 72 is rotated by the driving of the driving motor 71, and the rotating plate 32 to which the arcuate teeth 73 are fixed is rotated. Therefore, the seat body 10 is rotated by the operation of the moving mechanism 20 from the front position shown by the solid line in FIG. 1 to the side position shown by the two-dot chain line, and from the side position to the front position.

Accordingly, in the vehicle seat provided with the driving mechanism 70, the driving of the driving motor 71 of the driving mechanism 70 in the forward / reverse direction moves the seat body 10 from the front position to the side position, and Since it is possible to rotate from the side position to the front position and to restrict the rotation of the sheet body 10 when the drive motor 71 is not driven, the sheet body 10 can be fixed at a predetermined position. The installation of the lock mechanism 40 can be omitted.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a vehicle seat provided with a moving mechanism according to an example of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the vehicle seat.

FIG. 3 is an operation explanatory diagram of the moving mechanism.

FIG. 4 is perspective views (a) and (b) of a lock mechanism of the vehicle seat.

FIG. 5 is a schematic plan view of a vehicle provided with the vehicle seat.

FIG. 6 is a side view showing another example of a vehicle seat provided with a moving mechanism according to an example of the present invention.

FIG. 7 is a longitudinal sectional view of a main part of the vehicle seat.

FIG. 8 is a longitudinal sectional view of a main part of a vehicle seat provided with a drive mechanism for rotating the seat body.

FIG. 9 is a plan view of the driving mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Seat main body, 11 ... Seat cushion, 12 ... Seat back, 13 ... Headrest, 14 ... Armrest, 15 ... Footrest, 16 ... Support base, 16a ... Bracket, 17 ... Support shaft, 20 ... Moving mechanism, 21 ... First Fixed gear, 22 ... second fixed gear, 23 ... planetary gear, 24 ...
Connection arm, 30 support mechanism, 31 support cylinder, 32 rotating plate, 32a support hole, 33 bearing, 40 lock mechanism, 41 lock pin, 41a engagement protrusion, 42 lock guide, 43 Spring, 44 release lever, 44
a: gripping portion, 45a, 45b: stopper, 46: bolt, 51: cabin floor, 52: mounting base, 52a: bracket, 53a, 53b: pillar, 54: side door, 60: lifter, 61: base, 62: mobile table, 63
... Driving member, 64 ... Receiving stand, 65a, 65b ... Connection arm, 70 ... Driving mechanism, 71 ... Drive motor, 72 ... Small gear, 73 ... Circular tooth part, S1, S2 ... Vehicle seat, SF
... front seat, SR ... rear seat.

Claims (4)

[Claims] 1. A movement for moving a seat body of a vehicle seat supported on a vehicle floor between a front position facing a front side of the vehicle and a side position facing a doorway of the vehicle. A first fixed gear fixed to the passenger compartment floor side, a second fixed gear fixed to the seat body side, a planetary gear meshing with these fixed gears, and these respective gears. A moving mechanism for a vehicle seat, comprising a connecting arm rotatably supported and connected to each other. 2. A moving mechanism according to claim 1, wherein a pitch circle diameter of said first fixed gear is formed larger than a pitch circle diameter of said second fixed gear and said planetary gear. Characteristic vehicle seat moving mechanism. 3. The moving mechanism according to claim 1, wherein the moving mechanism is disposed between an upper surface of a mounting base provided on a vehicle floor and a lower surface of the seat body. A vehicle seat moving mechanism, characterized in that: 4. The moving mechanism according to claim 1, wherein the moving mechanism includes an upper surface of a mounting base provided on a vehicle cabin floor and a lower surface of a lifter that supports the seat body and moves up and down outside the vehicle. And a vehicle seat moving mechanism, which is disposed between the vehicle seat and the vehicle.